Are the colors of your raster imagery already looking perfect before any contrast stretching takes place? If your data is already processed, and then a contrast stretch is applied, your raster may become over-stretched. Overstretching will often cause your raster to look bleached out.
There are several ways to make sure that your imagery does not get stretched. You can set the stretch type for any layer as the None stretch.
Setting the stretch as None (using the Image Analysis window)
1) In the Image Analysis window, highlight all the raster layers that you want to set with no stretch
2) Change the stretch type to None
But this can be tedious to set each time you add in a new raster.
You can also set your raster to have no stretch by default:
- Set the Raster Options to never stretch any raster added into ArcGIS
- Set a particular raster to have the NONE stretch by default within ArcGIS
Stay tuned next week for Part 2 … setting a raster with no stretching as the default.
